It's an old secret workshop. I discovered it last year. No one at camp knew about it until after I found it, but it's been here for centuries.

[He flicks on all the lights and leads the way toward the back of the bunker to the desk where he keeps all the plans and things. And begins looking through the drawers for the thing he needs, which now can't even remember what it was, but he's sure he'll know it when he sees it.]